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Which equation has the same solution as 
x^(2)+13 x-20=1 ?

(x-6.5)^(2)=63.25

(x-6.5)^(2)=-21.25

(x+6.5)^(2)=63.25

(x+6.5)^(2)=-21.25

Which equation has the same solution as x2+13x20=1 x^{2}+13 x-20=1 ?\newline(x6.5)2=63.25 (x-6.5)^{2}=63.25 \newline(x6.5)2=21.25 (x-6.5)^{2}=-21.25 \newline(x+6.5)2=63.25 (x+6.5)^{2}=63.25 \newline(x+6.5)2=21.25 (x+6.5)^{2}=-21.25

Full solution

Q. Which equation has the same solution as x2+13x20=1 x^{2}+13 x-20=1 ?\newline(x6.5)2=63.25 (x-6.5)^{2}=63.25 \newline(x6.5)2=21.25 (x-6.5)^{2}=-21.25 \newline(x+6.5)2=63.25 (x+6.5)^{2}=63.25 \newline(x+6.5)2=21.25 (x+6.5)^{2}=-21.25
  1. Simplify Equation: Simplify the given equation by subtracting 11 from both sides to set it equal to zero.\newlinex2+13x201=0x^2 + 13x - 20 - 1 = 0\newlinex2+13x21=0x^2 + 13x - 21 = 0
  2. Complete the Square: Look for a way to express the given equation as a perfect square if possible. We can try to complete the square by finding a number that, when added and subtracted to the xx-term, forms a perfect square trinomial.\newlineThe coefficient of the xx-term is 1313, so we take half of it, which is 6.56.5, and square it to get 42.2542.25. We will add and subtract this number to complete the square.\newlinex2+13x+42.2542.2521=0x^2 + 13x + 42.25 - 42.25 - 21 = 0
  3. Rewrite and Simplify: Rewrite the equation with the completed square and simplify the constants on the right side.\newline(x+6.5)242.2521=0(x + 6.5)^2 - 42.25 - 21 = 0\newline(x+6.5)263.25=0(x + 6.5)^2 - 63.25 = 0
  4. Find Equivalent Equation: Now we need to find an equation that has the same solution as the completed square form of the original equation.\newlineWe can see that the equation (x+6.5)2=63.25(x + 6.5)^2 = 63.25 has the same solution as the completed square form of the original equation.

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